Energy Losses Reduction in the Medium Voltage Cable Line – Case Study

The paper presents an analysis of energy losses in a power cable system, which is composed of two 30 kV cable lines. This cable system is located at the seaside holiday area, so the load profile during a year is specific. Energy losses related to reactive power transmission, as well as to currents induced in the sheaths of the cables, are subject to analysis. Measurements were made in the system in order to prepare a computer model for calculation of current flow in the cable cores and the metallic sheaths, as well as to calculate power and energy losses. As a result of the conducted analyzes, the methods leading to the reduction of energy losses are shown, and potential savings related to them are revealed.